嵌套开关的问题 [英] problem with nested switches
问题描述
您好，
当我编译它时，我在第16行得到一个错误，其中包含c的情况。
#include< cstdlib>
#include< iostream>
#include< math.h>
using namespace std;
int main（）
{
浮动x，y;
双r;
char o;
cout<<"要使用计算器，请按C" << endl<<"要按下Q"
<< endl;
switch（o）;
{
case''c''：cout<<"输入数学运算 << endl;
cin>> x>> o>> y;
switch（o）
{
case''+''：r = x + y;
cout<<"""""" << r<< endl;
休息;
case'' - ''：r = xy;
cout<<"结果是：" << r<< endl;
休息;
case''*''：r = x * y;
cout<<"结果是：" << r<< endl;
休息;
case''/''：r = x / y;
cout<<"结果是：" << r<< endl;
休息;
case''^''：r = pow（x，y）;
cout<<"结果是：" <<<<< endl;
休息;
默认：cout<<"错误：输入错误"
<< endl;
}
休息;
案例''q''：cout <<" CYA" << endl;
休息;
}
system（" PAUSE"）;
返回EXIT_SUCCESS;
}
伙计们，我刚开始编程2天前所以请放轻松我:)。
-
Mustafa Zaza
Hello,
When I compile it I get an error in line 16, which got case ''c''.
#include <cstdlib>
#include <iostream>
#include <math.h>
using namespace std;
int main()
{
float x, y;
double r;
char o;
cout <<"To use the calculator press C" <<endl <<"To quite press Q"
<<endl;
switch (o);
{
case ''c'': cout <<"Enter the mathmatical operation" <<endl;
cin >>x >>o >>y;
switch (o)
{
case ''+'': r=x+y;
cout <<"The result is: " <<r <<endl;
break;
case ''-'': r=x-y;
cout <<"The result is: " <<r <<endl;
break;
case ''*'': r=x*y;
cout <<"The result is: " <<r <<endl;
break;
case ''/'': r=x/y;
cout <<"The result is: " <<r <<endl;
break;
case ''^'': r=pow(x, y);
cout <<"The result is: " <<r <<endl;
break;
default: cout <<"Error: wrong input"
<<endl;
}
break;
case ''q'': cout <<"cya" <<endl;
break;
}
system("PAUSE");
return EXIT_SUCCESS;
}
Guys, I just started programming 2 days ago so take it easy on me :).
--
Mustafa Zaza
推荐答案
MZaza写道：
MZaza wrote:
您好，
当我编译它时，我在第16行得到一个错误，其中包含c的情况。
#include< cstdlib>
#include< iostream>
#include< math.h>
using namespace std;
int main（）
{
浮动x，y;
双r;
char o;
cout<<"要使用计算器，请按C" << endl<<"要完全按下Q"
<< endl;
switch（o）;
Hello,
When I compile it I get an error in line 16, which got case ''c''.
#include <cstdlib>
#include <iostream>
#include <math.h>
using namespace std;
int main()
{
float x, y;
double r;
char o;
cout <<"To use the calculator press C" <<endl <<"To quite press Q"
<<endl;
switch (o);
分号？这里''o'的价值是多少？
A semicolon? And what is the value of ''o'' here?
{
case''c''：cout<< 输入数学运算 << endl;
cin>> x>> o>> y;
switch（o）
{
case''+''：r = x + y;
cout<<"""""" << r<< endl;
休息;
case'' - ''：r = xy;
cout<<"结果是：" << r<< endl;
休息;
case''*''：r = x * y;
cout<<"结果是：" << r<< endl;
休息;
case''/''：r = x / y;
cout<<"结果是：" << r<< endl;
休息;
case''^''：r = pow（x，y）;
cout<<"结果是：" <<<<< endl;
休息;
默认：cout<<"错误：输入错误"
<< endl;
}
休息;
案例''q''：cout <<" CYA" << endl;
休息;
}
system（" PAUSE"）;
返回EXIT_SUCCESS;
}
伙计们，我刚开始编程2天前所以请放轻松我:)。
{
case ''c'': cout <<"Enter the mathmatical operation" <<endl;
cin >>x >>o >>y;
switch (o)
{
case ''+'': r=x+y;
cout <<"The result is: " <<r <<endl;
break;
case ''-'': r=x-y;
cout <<"The result is: " <<r <<endl;
break;
case ''*'': r=x*y;
cout <<"The result is: " <<r <<endl;
break;
case ''/'': r=x/y;
cout <<"The result is: " <<r <<endl;
break;
case ''^'': r=pow(x, y);
cout <<"The result is: " <<r <<endl;
break;
default: cout <<"Error: wrong input"
<<endl;
}
break;
case ''q'': cout <<"cya" <<endl;
break;
}
system("PAUSE");
return EXIT_SUCCESS;
}
Guys, I just started programming 2 days ago so take it easy on me :).
-
请在通过电子邮件回复时删除资金''A'
我不要回复最热门的回复，请不要问
--
Please remove capital ''A''s when replying by e-mail
I do not respond to top-posted replies, please don''t ask
MZaza schrieb：
MZaza schrieb:
你好，
当我编译它时，我在第16行得到一个错误，它得到了'c'的情况。
Hello,
When I compile it I get an error in line 16, which got case ''c''.
如果您向我们提供了您收到的错误消息，将会有所帮助。
It would help if you provided us the error message you got.
#include< cstdlib> ;
#include< iostream>
#include< math.h>
using namespace std;
int main（）
{
浮动x，y;
双r;
char o;
cout<<"要使用计算器，请按C" << endl<<"要完全按下Q"
<< endl;
switch（o）;
#include <cstdlib>
#include <iostream>
#include <math.h>
using namespace std;
int main()
{
float x, y;
double r;
char o;
cout <<"To use the calculator press C" <<endl <<"To quite press Q"
<<endl;
switch (o);
^
尝试删除分号。
^
Try to remove the semicolon here.
{
case''c''：cout<<"输入数学运算 << endl;
cin>> x>> o>> y;
{
case ''c'': cout <<"Enter the mathmatical operation" <<endl;
cin >>x >>o >>y;
[...]
-
Thomas
http://www.netmeister.org/news/learn2quote.html
sigfault
[...]
--
Thomas
http://www.netmeister.org/news/learn2quote.html
sigfault
3月5日，9：13 pm，Victor Bazarov < v.Abaza ... @ comAcast.netwrote：
On Mar 5, 9:13 pm, "Victor Bazarov" <v.Abaza...@comAcast.netwrote:
MZaza写道：
MZaza wrote:
您好，
Hello,
当我编译它时，我在第16行得到一个错误，得到了'c'的情况。
When I compile it I get an error in line 16, which got case ''c''.
#include< cstdlib>
#include< iostream>
#include < math.h>
using namespace std;
#include <cstdlib>
#include <iostream>
#include <math.h>
using namespace std;
int main（）
{
浮动x，y;
double r;
char o;
int main()
{
float x, y;
double r;
char o;
cout<<"要使用计算器，请按C" << endl<<""要按Q"
<< endl;
cout <<"To use the calculator press C" <<endl <<"To quite press Q"
<<endl;
switch（o）;
switch (o);
分号？这里''o'的价值是多少？
A semicolon? And what is the value of ''o'' here?
{
case''c''：cout<< 输入数学运算 << endl;
cin>> x>> o>> y;
{
case ''c'': cout <<"Enter the mathmatical operation" <<endl;
cin >>x >>o >>y;
switch（o）
{
case''+''：r = x + y;
cout<<"结果是：" << r<< endl;
休息;
switch (o)
{
case ''+'': r=x+y;
cout <<"The result is: " <<r <<endl;
break;
case'' - ''：r = xy;
cout<<"结果是： " << r<< endl;
休息;
case ''-'': r=x-y;
cout <<"The result is: " <<r <<endl;
break;
case''*''：r = x * y;
cout<<"结果是： << r<< endl;
休息;
case ''*'': r=x*y;
cout <<"The result is: " <<r <<endl;
break;
case''/''：r = x / y;
cout<<"结果是： << r<< endl;
休息;
case ''/'': r=x/y;
cout <<"The result is: " <<r <<endl;
break;
case''^''：r = pow（x，y）;
cout<<" ;结果是： << r<< endl;
休息;
case ''^'': r=pow(x, y);
cout <<"The result is: " <<r <<endl;
break;
default：cout<<"错误：输入错误"
<< endl;
}
休息;
default: cout <<"Error: wrong input"
<<endl;
}
break;
case''q''：cout<<" cya" << endl;
休息;
}
case ''q'': cout <<"cya" <<endl;
break;
}
system（" PAUSE" ;）;
返回EXIT_SUCCESS;
}
system("PAUSE");
return EXIT_SUCCESS;
}
伙计们，我刚刚开始编程2几天前所以放轻松对我:)。
Guys, I just started programming 2 days ago so take it easy on me :).
-
请在通过电子邮件回复时删除资金''A'
我不要回复最热门的回复，请不要问
--
Please remove capital ''A''s when replying by e-mail
I do not respond to top-posted replies, please don''t ask
我应该从用户那里得到o的值，就像x和
y。
这就是你的意思吗？
I should get the value of the ''o'' from the user, just as the x and the
y.
Is that what you mean?
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